CN102465872A - Externally-engaged gear pump - Google Patents
Externally-engaged gear pump Download PDFInfo
- Publication number
- CN102465872A CN102465872A CN2010105495036A CN201010549503A CN102465872A CN 102465872 A CN102465872 A CN 102465872A CN 2010105495036 A CN2010105495036 A CN 2010105495036A CN 201010549503 A CN201010549503 A CN 201010549503A CN 102465872 A CN102465872 A CN 102465872A
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- China
- Prior art keywords
- gear
- oil
- pump
- end cap
- gear pump
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Abstract
The invention relates to an externally-engaged gear pump, belonging to the field of fluid conveying devices. The externally-engaged gear pump comprises a pump casing, wherein a pair of externally-engaged gears is arranged in the pump casing, an oil inlet is arranged at one side of the pump casing, an oil discharging opening is arranged at the other side of the pump casing, two end caps are arranged on the pump casing, and are matched with end faces of the gears, gear shafts are installed in bearing seats through bearings, the bearing seats are arranged on the end caps, the gear shaft of a driving gear penetrates through any end cap, and is in transmission connection with a driving mechanism, a load discharging opening is arranged at a position corresponding to the engaged position of the two gears, a pressure balancing groove is arranged on an end cap corresponding to the upper side and the lower side of the oil inlet, and an external oil pipe is arranged at the outer side of the end cap to communicate the load discharging opening with the pressure balancing groove. When the externally-engaged gear pump is in operation, oil in an oil trapping area can be introduced by the external oil pipe to the upper side and the lower side of the oil inlet so as to balance pressure from the oil discharging opening and to protect the bearings and the bearing seats; the problems on oil trapping and eccentric wear of the bearings of the gear pump are also solved; and therefore the gear pump has the advantages of long service life and low working noise.
Description
Technical field
The present invention relates to a kind of fluid delivery system, particularly a kind of gear pump.
Background technique
External gear pump generally is used for conveying, the transportation by lighter of oil; This device mainly includes pump case, is provided with the gear of a pair of outer gearing in the pump case, and pump case one side is provided with filler opening; Opposite side is provided with oil drain out; Match with the end face of gear on the pump case and be provided with end cap, gear shaft is in the bearing support that Bearing Installation is provided with on end cap, and the gear shaft of driving gear wherein passes end cap and driving mechanism is in transmission connection.Existing external gear pump adopts the standardized involute gear of modulus as general, and has backlash, and the overlap coefficient that gear pump requires gear for stable drive is greater than 1, and promptly last when the gear teeth are broken away from engagement as yet, the following a pair of gear teeth mesh.Like this, be in simultaneously in the time of engagement, form an enclosed space that carries liquid between two pairs of gear teeth at adjacent two pairs of gear teeth; Problem is the rotation along with gear, and the volume of this enclosed space changes, because the compressibility of liquid is very little; Therefore, as bringing the liquid of this enclosed space into oil drain out by force, will cause the noise and the pressure surge of pump; Influence the life-span of pump, this phenomenon is the entrap phenomenon of gear pump.
For solving the entrap phenomenon of gear pump; Available technology adopting is offered the off-load mouth on the corresponding end cap in pocketed oil position; The off-load mouth extends from pocketed oil point position and connects oil drain out, thereby the oil of pocketed oil position is in time entered oil drain out, to guarantee the smooth running of pump.
Gear pump is in when work, because from a side oil-feed, and the opposite side oil extraction, the pressure of oil extraction side is much larger than the pressure of oil-feed side, and this bearing, bearing support that can cause the carrier gear axle is all the time in pure stress, and bearing is easy to eccentric wear.
Summary of the invention
The purpose of this invention is to provide a kind of external gear pump, make its entrap phenomenon that can solve gear pump simultaneously and bearing eccentric wear phenomenon, make the gear pump running steadily, noise is little, the life-span is long.
The objective of the invention is to realize like this: a kind of external gear pump; Comprise pump case, be provided with the gear of a pair of outer gearing in the pump case, pump case one side is provided with filler opening; Opposite side is provided with oil drain out; Match with the end face of gear on the pump case and be provided with two end caps, gear shaft is in the bearing support that Bearing Installation is provided with on end cap, and the gear shaft of driving gear wherein passes arbitrary end cap and driving mechanism is in transmission connection; Said two gear engagement position corresponding sections are provided with the off-load mouth, and the said filler opening corresponding end cap in both sides up and down is provided with relief groove, and the said end cap outside is provided with external oil pipe off-load mouth and relief groove are connected.
During this device work; Oil in the pocketed oil zone can be imported to filler opening both sides up and down by external oil pipe, about filler opening, produces pressure on the gear teeth of both sides correspondence, and this pressure is higher than the pressure of oil drain out; But balance comes from the pressure of oil drain out; Make and only bear less side-thrust on the gear shaft, with protection bearing and bearing support, make the running noise of gear pump little, pressure surge is little; Because gear pump leaves the gap inevitably between gear face and end cap in manufacture process; Be pressed into the interior oil of corresponding teeth groove when running near oil drain out one side; Its pressure has obtained release basically; Therefore, it can guarantee the normal operation of gear pump, can not form reverse oil pressure in high pressure one side.Compared with prior art, the present invention has solved the pocketed oil problem and the bearing eccentric wear problem of gear pump simultaneously, makes that gear pump running life is long, operating noise is little.
For further guaranteeing the stress equalization of two gears, said relief groove is provided with in the filler opening bilateral symmetry.
As further improvement of the present invention, said relief groove can be connected oil drain out through relief valve.To guarantee that unnecessary oil can in time import oil drain out, can adapt to the change in rotational speed of pump, no matter rotating speed just all can make institute's pocketed oil fluid power in time led away, simultaneously, has guaranteed that also the pressure in the relief groove is in the safety range.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the structural representation of end cap.
Fig. 3 is the left view of end cap among Fig. 2.
Fig. 4 is another structural representation of the present invention.
Wherein, 1 gear, 2 oil drain outs, 3 pump cases, 4 filler openings, 5 end caps, 6 external oil pipes, 7 bearing supports, 8 relief valves, A, B relief groove, C off-load mouth.
Embodiment
Shown in the 1-3 as shown in the figure, be a kind of external gear pump, comprise pump case 3; Be provided with the gear 1 of a pair of outer gearing in the pump case 3; Pump case 3 one sides are provided with filler opening 4, and opposite side is provided with oil drain out 2, and matching with the end face of gear on the pump case 3 is provided with two end caps 5; Gear shaft is in the bearing support 7 that Bearing Installation is provided with on end cap 5, and the gear shaft of driving gear wherein passes arbitrary end cap and driving mechanism is in transmission connection; Corresponding section, said two gears, 1 engaging position is provided with off-load mouth C, and the end cap 1 of filler opening both sides correspondence about in the of 4 is provided with relief groove A and B, and end cap 1 outside is provided with external oil pipe 6 off-load mouth C and relief groove A, B are connected; Relief groove A and B are provided with in the filler opening bilateral symmetry.
Like Fig. 4, be that with embodiment's 1 difference relief groove A, B connect oil drain out through relief valve 8.It can make institute's pocketed oil liquid in time led away, simultaneously, has guaranteed that also the pressure in the relief groove is in the safety range, even oil mass is bigger, also can guarantee in time oil to be imported in the oil drain out smooth running of assurance device.
Claims (3)
1. external gear pump; Comprise pump case, be provided with the gear of a pair of outer gearing in the pump case, pump case one side is provided with filler opening; Opposite side is provided with oil drain out; Match with the end face of gear on the pump case and be provided with two end caps, gear shaft is in the bearing support that Bearing Installation is provided with on end cap, and the gear shaft of driving gear wherein passes arbitrary end cap and driving mechanism is in transmission connection; It is characterized in that: said two gear engagement position corresponding sections are provided with the off-load mouth, and the said filler opening corresponding end cap in both sides up and down is provided with relief groove, and the said end cap outside is provided with external oil pipe off-load mouth and relief groove are connected.
2. a kind of external gear pump according to claim 1 is characterized in that: said relief groove is provided with in the filler opening bilateral symmetry.
3. a kind of external gear pump according to claim 1 and 2 is characterized in that: said relief groove is connected oil drain out through relief valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105495036A CN102465872A (en) | 2010-11-19 | 2010-11-19 | Externally-engaged gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105495036A CN102465872A (en) | 2010-11-19 | 2010-11-19 | Externally-engaged gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102465872A true CN102465872A (en) | 2012-05-23 |
Family
ID=46069879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105495036A Pending CN102465872A (en) | 2010-11-19 | 2010-11-19 | Externally-engaged gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102465872A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102837968A (en) * | 2012-09-12 | 2012-12-26 | 刘华 | Powder conveying system |
| CN109209865A (en) * | 2018-11-21 | 2019-01-15 | 太原科技大学 | A kind of axle sleeve and method inhibiting gear pump noise |
| CN111852646A (en) * | 2020-07-09 | 2020-10-30 | 唐秦 | Shell for air supercharging device and manufacturing method thereof |
-
2010
- 2010-11-19 CN CN2010105495036A patent/CN102465872A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102837968A (en) * | 2012-09-12 | 2012-12-26 | 刘华 | Powder conveying system |
| CN102837968B (en) * | 2012-09-12 | 2015-10-28 | 刘华 | Powder delivery system |
| CN109209865A (en) * | 2018-11-21 | 2019-01-15 | 太原科技大学 | A kind of axle sleeve and method inhibiting gear pump noise |
| CN111852646A (en) * | 2020-07-09 | 2020-10-30 | 唐秦 | Shell for air supercharging device and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120523 |